legard



Feb. 21, 1956 R. H. LEGARD, JR, ET AL WINDING AND TWISTING Filed Sept.24, 1954 INVENTORS P05597- 19. 456490 J/a Y 54/? 1Q NEAaowS UnitedStates Patent" 6) WlNDINGlA'ND 'I WI S'TING e ward. ra -n aaws Pearsliilrg, .VaLgas'sIgH rs to fCelai ese Corporahon of America, New.Yiirk', N. Y a cbrporation' of Delaware Appliafibl'l septmb'ei' 24,!.1954; Serial N$458076 rota-iii; (Cl. 57: 9.3

This inventionvrelates towir'rd-ing and twisting and relates moreparticularly to apparatus for winding and twisting 3 filamentar'y nraterial to fonn a paekage offilanientary material having substantiallyuniform twist throughoutits-lengt-h;

It*i s' an* objct or this invention 'to provide; novel wind ing andtwisting apparatus in which" filamentary mate; rial is 'wou'n'd 'into apackage and twisted in "suchfa manner that the degree of twist issubstantially uniform throughout said packager Other objects'of'thisinvention, togetherfwith certain details of construction andcombinations of parts, will be apparent from the following detaileddescription and claim.

In the' accompanyingdrawingwherein' a preferreWembodiment of thisiIlVHfiQQflSfShQWlI Fig. 1 is a view in perspective of the generalarrangement of the-app aratus; and

Fig. 2 is a view in perspective of the speed-varying mechanism employedin the apparatus of this invention.

Like reference numerals refer to like parts throughout both views of thedrawing.

Referring now to the drawing, and in particular to Fig. 1 thereof,reference numeral 11 designates a supply bobbin wound with yarn 12 to betwisted. While two supply bobbins are shown in the drawing, thedescriptions will be limited to one since both bobbins are operated bysimilar elements. The bobbin 11 is mounted on and rotated by a rotatablevertical spindle 13 which is driven by the engagement of a travellingbelt 14 with a whorl 16 formed on said spindle, the belt 14 being inturn driven by a motor 17 through a driving pulley 18. The yarn is drawnoff the end of the bobbin 11 through a fixed guide 19 positioned at apoint above the spindle 13 and then passes over a plate 21 and through aceramic button guide 22, movably supported on said plate 21, to a drivenyarn package support, such as a conical or cylindrical tube, on whichits is taken up in the form of a yarn package 23. The button guide 22 ismoved by any suitable traversing mechanism to and fro along the lengthof the yarn package 23 in order to form said package in the desiredWinding pattern.

During its passage between the revolving supply bobbin 11 and the buttonguide 22 the yarn 12 becomes twisted, the extent of the twist, asmeasured in turns per inch, depending completely on the relation betweenthe rotational speed of the driven supply bobbin 11 and the linear speedof the yarn 12. The linear speed of the yarn itself is a function of therotational speed of the yarn package 23 and the diameter of said yarnpackage at the point where the yarn is being wound. Accordingly, if thepackage 23 were rotated at a constant rotational speed the linear speedof the yarn 12 would increase as the yarn built up on the package. If atthe same time the rotational speed of the bobbin 11 were kept constant,the degree of twist on the yarn, as measured in turns per inch, woulddecrease as the winding of the yarn on the cone progressed.

The apparatus of this invention includes an arrange- 2,735,257 Freware-.2 19,5

is" mounted; therbett 24 being? driven through :apositive infinitelyvariable transmission; generally indicated; by refe'rence num'eral2 28,havingiparallel input- I? and output shaftss liand i32,-: respective1yi-The out ut shaft 32 serves 1 to drive the: belt 724*while the input '1shaft 311 is rotated? either by the motor 17 which drivesibobbin llior'by 'any other :suitable prime mover whose-speed isi inaintainedlat azvaliie whi'c'hiibears': a constant t ratio *tothe speed' of said:

The positive infinitely variable transmissioh ltli com prises (Fig. .2)a pair o ii lp ulleys 33" haviiig opposed' g nerally conical groovedfaces 34 and mountedfionthe outp11t1shaft132iandfalpair ofsimitarpuIleys SB n'iou'n" on thesinputtshaft 3:1 The-shafts fl and 32'are spl'i'ned 'as at 37 so" thatthe pulleys 0f *ea'ch pat'r' can: bemoved close'r togetheror tartlreriapart: The shatts 'sl and SZ -ai-ekine mati'cally connected; through the: pulleys 33: and 36,? byanfendl'essobelfiias havingftd'o thed edges "39, with the teeth of.the'ibeltofiten ga'gin in the grooves 'of'theconical Et'aces e apparentthatit. d axially closer r together while the .1 3'6 rare mbved'raxiallyfurther apart the toothed 3 ill ngag'e the pulleys -3'6 a a po t'clos'er to' tlie axisrofi'th rinpi'ittsh ft"31':a 'l-erigage thepulleys 33; at .a -lpointi' fuitheri from e akis t the outpnt shaft -SZ;

pnll'eys'23'3 are move pulle therebv-deereas pnnshatitzahdizthecspeed ofithe input shialit. These axial nrdive'ments'roli the:pulleys 33rand' 36ate. efiected byit'ie'aiis of levers 41, 42 mounted along the sides ofsaid pulleys. Each lever 41, 42 is in the form of a pair of members 43,44, one below and one above the shafts 31 and 32, said members 43, 44being connected by pins 46. Each lever is pivoted on a vertical axis 47between the shafts 31 and 32 and is connected to pulleys 33 and 36 atopposite sides of said pivotal axis 47.

The positions of the levers 41, 42 are controlled by a pair of alignedrods 48, 49, respectively. One end of each rod is connected to the endof one of the levers by pins 51, 52, while the opposite end (Fig. 1) ofeach rod 48, 49 abuts against the surface of one of a pair of rotarycams 53, 54. The rods 48, 49 are urged apart and pressed against thecams 53, 54, respectively, by a spring 56 (Fig. 2) mounted between thepins 51, 52. The cams 53, 54 are driven at equal speeds, through anarrangement of shafts, pulleys and gearing, which arrangement isdesignated generally by reference numeral 57, by the motor 17, thearrangement being such that each cam 53, 54 makes one completerevolution during the period of time necessary to wind the package 23fully. It will be appreciated, of course, that the cams 53, 54 may bedriven by any other prime mover whose speed is constantly proportionalto that of the motor 17. For example, when the speed of the motor 17 isconstant the cams may be driven by any suitable timing arrangement.

The constructions of the cams 53, 54 and their directions of rotationare such that the rods 48, 49 are forced most closely towards each otherby said cams at the beginning of the winding of the package 23. As thewinding progresses the cams permit the rods 48, 49 to spread furtherapart in response to the urging of the spring 56, and thus cause therotational speed of the package 23, relative to the speed of the bobbin11, to decrease until the package 23 has been fully wound, at which timethe cams have completed one cycle of revolution and the rods 48, 49 areagain forced closely together by said sams and the fully wound yarnpackage 23 is replaced by an empty yarn package support, e. g. a conicalor cylindrical tube. The replacement of the fully wound yarn package byan empty i the yarn-"12 thereon proceeds) More yarn package support isefiected by the operator of the machine or by any suitable automaticarrangement.

As indicated in the drawing and mentioned above the device of thisinvention will generally contain a plurality of spindles 13, all drivenat the same speed from a common motor 17, and a plurality of packages23, which may be conical or cylindrical or both, all driven at the samespeed from the output shaft 32. In this case all the yarn packagesshould be defied and donned at the same time. During the period when allthe packages are dotted and donned the rotation of the earns 53, 54should be stopped in order to insure that the cams will be at the properpoint when winding begins again.

It is'to be understood that the foregoing detailed description is merelygiven by way of illustration and that many variations may be madetherein without departing from the spirit of our invention.

Having described our invention, what we desire to secure by LettersPatent is:

Apparatus for the twisting and winding of filamentary materialcomprising a spindle for holding and rotating a wound package offilamentary material, means for driving said spindle, a mounting forholding and rotating a support for a second package of filamentarymaterial to wind the filamentary material from said first package ontosaid second package, means for driving said mounting, a guide positionedaxially of said spindle for receiving the filamentary material beingunwound from said first package, the construction and arrangement beingsuch that said yarn becomes twisted as it passes from said firstpackageto said second package, means for varying the relative speeds ofsaid two driving means so as to decrease the speed of said mountingdriving means relative to the speed of said spindle driving means as thediameter of said second package increases due to the winding offilamentary material thereon, said varying means comprising an inputshaft driven at a speed proportional to the of said levers beingoperatively connected to one of each of said pairs of pulleys forvarying the spacing of said pulleys so as to vary the ratioof the speedsof said input and output shafts, a spring acting on said levers and urging said levers in a direction to increase the ratio of the speeds ofsaid input and output shafts, a pair of rods each connected to one ofsaid levers, a pair of rotatable cams having surfaces engaged by saidrods for operating said levers through said rods, the surfaces of saidcams being so constructed as to effect, by their operation of saidlevers, an increase in the ratio of the speeds of said input and outputshafts during the time necessary to wind said second package fully, andmeans for driving said cams at a speed proportional to the speed of saidspindleand. at a rate such that the desired increase in the ratio of thespeeds of said input and output shafts is efiected during each cycle ofcomplete winding of said second package.

References Cited in the file of this patent UNITED STATES PATENTS ItalyMar. 31, 1936

